Sum of top two: 45 + 90 = <<45 + 90 = 135>>135

Thu, 16 Apr 2026 18:27:07 +0000

The Simple Math Behind The Sum of the Top Two: 45 + 90 = 135 Understanding basic arithmetic is a fundamental building block of mathematics — and some of the clearest examples come from simple equations like 45 + 90 = 135. At first glance, this equation seems elementary, but mastering such sums unlocks stronger numerical confidence and lays the foundation for more complex problem-solving. ### The Sum Explained: Why 45 + 90 Equals 135 Addition is the process of combining quantities. When we calculate 45 + 90, we are merging 45 units with 90 units to arrive at a total of 135 units. This straightforward calculation demonstrates the core principle of arithmetic: combining numbers to determine a combined total.